In a Study Investigating the Effects of Three Different Diets

Multiple Choice

In a study investigating the effects of three different diets (Diet) on physical abilities, twelve participants were divided evenly into three groups. Each group was assigned a particular diet and each participant was measured on a physical ability test on seven consecutive days (Trials) . What are the appropriate denominator degrees of freedom for the F-test on the Diet × Trials interaction?

A) 2
B) 6
C) 12
D) 54